Apparatus for desulfurizing ores.



No. 680,17I. Patenfed Aug. 6, IQGI.v E. M. BVIATT 8:. A. DEAN. APFIARATUS FOR DESULFURIZING DRES.

(Application filed Nov. 12, 1900.) Y

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Patented Aug. s, 190|.

No. Gamm.

E. M. OVIATT A. DEAN.

APPARATUS FOR DESULFUEIZING GRES.

(Application led Nov. 12, 1900.)

(No Model.)

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NITED STATES PATENT OFFICE.

ELLEN M. OVIATT AND ALEXANDER-DEAN, OF DENVER, COLORADO.

APPARATUS FOR DESULFURIZING ORES.

'SPECIFICATION forming part of Letters Patent No. 680,171, dated August 6, 1901'. Application iiled November 12,1990. Serial No. 36,171. (No model.)

To @ZZ whom it may concern:

Be it known that we, ELLEN M. OvIA'rT and ALEXANDER DEAN, citizens of the United States, residing in Denver, in lthe county of Arapahoe and State of Colorado, have invented certain new and useful Improvements in Apparatus for Desulfurizing Orcs, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specication.

Our invention relates to an apparatus for' use in extracting sulfur from sulfur-bearing ores, the prime object of the invention being to provide an apparatus in which the major portion of sulfur is removed in gases at the lowest temperature in order that other values that are more susceptible to loss maybe preserved.

A further object is to provide means whereby the sulfurous gases are delivered from the apparatusimmediately upon their release.

A further object is to provide for the release from the ore of the last traces of sulfur by subjecting such ore to intense heat, thus transforming the sulfur into a xed gas.

Our invention consists in features of novelty hereinafter more particularly described, and set forth in the claims.

Figure I is a view of our apparatus, shown partly in perspective and partly in vertical section.

tion. Fig. III is a vertical sectional View taken on the line III III, Fig. I. Fig. IV is a vertical sectional View taken on the line IV IV, Fig. I. Fig. V is an enlarged cross-sectional view of the retort-cylinder and the screw conveyer therein. Fig. VI is a vertical sectional view taken on the line VI VI, Fig. IV.

1 designates a furnace-body, within which are a settling-chamber 2 and a trough 3, the trough being located at a greater elevation than the bottom of the settling-chamber and inclined upwardly from one of the end Walls of the furnace to the settling-chamber. The

interior of the furnace is heated by a iame burning in the trough 3, the flame being produced by the use of any suitable fuel. We

shaft 10 are perforations 10a. yand V.)

Fig. II is a view of the retort-cylin-j der, screw conveyer, and gas-conveyer, shown partly in elevation and partly in vertical seo-V prefer to utilize gas or oil as the fuel consumed and introduce the fuel through a fuell pipe 4, provided with a nozzle 5, through which the fuel is injected by the use of a blast-pipe suitably applied thereto.

6 designates a retort-cylinder located in the furnace in an inclined position and having its lowermost inner end set into the wall of the 'furnace-body, as seen in Figs. I and II. The vretort-cylinder is provided with an outlet4 7, ylocated at the lower end thereof above the trough 8, and at the opposite or upper end the cylinder has applied to it a hopper-chute '8, through which the ore to be treated, previously crushed, is introduced into the cylinder. The outer end of the cylinder 6 is The cyllO designates a hollow conveyer-shaft provided with a conveyer-screw 1l and arranged to be revolved by power applied toa drivepulley l2 and belt 13 or other suitable means. The innerend of the shaft 10 is mounted in a ball-bearing box 14, (see Fig. II,) so that the shaft may be caused to turn freely and with the least friction. At intervals in the'hollow (See Figs. III

.- l5 designates Weighted valves carried lby arms 16, pivotally connected to the shaft 1'0.

The valves 15 are adapted to close the per- 'forations 10t during the period that the shaft is revolving with the perforations uppermost, falling by gravity thereto. As the valves descend in the rotation of the shaft they swing away from the perforations, thereby uncovering said perforations and permitting the exit of steam or hot air forced through the hollow :shaft by suitable means.

Fixed to the conveyer-shaft 10 at theplocainder and cause the ore to fall in streams at IOO . risers lead to a manifold 20, into which the sulfurous gases are conducted as they are" evolved from the ore treated in the retort-cyl- The manifold 2O has connected to it a conveying-pipe 21, that may lead to a sui'tjpipe.

the locations of the perforations 10, so that the particles of ore may receive the full benefit of the steam or hot air forced into the cylinder through the conveyer-shaft. l

18 designates an inclined chute located beneath the outlet 7 of the retort-cylinder and by which the vore is directed into the troughy as it escapes from the cylinder after passing therethrough.

Surmountiug the retort-cylinder and leading from the interior thereofare risers 19. We

have shown three of these risers; but there may be any other desirable number. The

inder.

able receiving-chamber to deliver the sulfurous gases thereto for treatment to obtain? the values contained by such gases.

22 designates a steam-pipe provided with a 1 jet-nozzle 23, (see Fig. II,) that `enters thev conveying-pipe 21 and serves as an aspirator to draw the gases into said conveying-pipe. We have shown the steam-pipe 22 extending through the manifold 20; but it is evident that it may be placed in any other desirable ber 2.

2l discharges.

bottom of the settling-chamber, said opening being closed by a gate 26.

Access .to the interior of the furnace is provided through a doorway 27, closed by a door:

28. (See Fig. III.)

cylinder 6. The ore, previously crushed, Vis introduced into the retort-cylinder through the hopper 8 and is conveyed therethrough by the screw conveyer operating within the`l As the ore passes through the re-f cylinder. l tort-cylinder it is heated to a sufficient extent to liberate the sulfur therefrom in gases, and the said gases pass from the retort-cylf inder through the risers 19 into the manifold 20, from Which they are conducted into the conveying-pipe 21, under the action of ther aspirator-nozzle 23, that enters the conveyinging-pipe to a suitable receiving-chamber, as

stated, for treatment to obtain the values thereof.

tions l0a and receives the blast of steam or hot air emanating from the conveyer-shaftj The gases ypass through the convey- As the ore is conveyed through theE retort-cylinder it is constantly lifted by the blades 17 and'falls in front of the perforaore being thereby subjected to the steam or hot air to separate them from each-other and permit the sulfurous gases to escape under theaction of the heat Within the retort-cylinder. The major portion of the sulfur contained by the ores is effectually' liberated therefrom as the ore is passed through the retort-cylinder and at a temperature prefery ably not exceeding400 Fahrenheit, at which temperature sulfur is supposed to be volatile. The remaining trace of sulfur is liberated from the ore afterit vpasses from the retort-cylinder through thedischarge-opening 7 into the trough 3. As the ore falls from the retort-cylinder into the trough 3 it descends into the flame in said.l trough, Where it. is subjected totheintense .heat of the flame. The sulfur retained by the ore is freed and becomes a fixed gas, which passes from the interior of the furnace through the flue 24, While the ore is carried into the settlingchamber 2 by the force o f the blast emanating from vthe fuel-pipe nozzle. The ore-is removedfrom the settling-chamber through the discharge-opening 25 upon the removal of the gate 26.

We claim as our invention- 1. In an apparatus of the character described, the combination of a furnace, havinga settling-chamber, means for heating the interior of said furnace, a retortcylinder mounted within said furnace, and discharging in front of the means for' heating the inj terior of the furnace,a conveyer arranged to 25 designates a discharge-opening' at the operate within said retort-cylinder, a manifold located directly over the retort-cylinder, having 'communication with said retort-cylinder, and means whereby the gases liberated in said retort-cylinder-are drawn into and del v' livered 'from said manifold, the means for In the .practical use of `this apparatus the` interior ofthe furnace is lfirst heated Iby thel consumption of fuel injected through thez fuel-pipe 4, so that 'the ame -Will be produced within the trough 3 and immediately' beneath the inner discharge end of the retortheating the interior of the furnace being adapted to complete the roasting of the ore and drive it into the settling-chamber, substantially as described.

'2. In an apparatus of the character' described, the combination of a furnace, having a settling-chamber, a retort-cylinder mounted Within said furnace and provided with an outlet, a conveyer arranged to operate in said retort-cylinder, and means\ for heating the interior of Vsaid furnace immediately beneath the outlet from said retort-cylinder, vthe means for heating the interiorfof the furnace being adapted to complete the roasting of the ore and drive it into the settling-chamber, substantially as described.

3. In an apparatus of the character described, the combination of a furnace, having a settlingchamber, a retortcylinder mounted in said furnace, a conveyer arranged to operate in said vretort-cylinder, a trough located Within said furnace beneath the outsaid trough and immediately beneath the outlet from said retort-cylinder, the means for heating the interior of the furnace being ICO IIO

adapted to complete the roasting of the ore and drive it into the settling-chamber, substantially as described.

4. In an apparatus of the class described, the combination of a furnace, having a settling-chamber and trough therein, means for eecting a blast-flame Within said trough, and for driving the ore into the settling-chamber, a retortcylinder having an outlet located above said trough,and a conveyer arranged to operate in said retort-cylinder, substantially as described.

5. In an apparatus of the character described, the combination of a furnace, a retort-cylinder Within said furnace, a conveyer having a shaft formed with openings and mounted in said retort-cylinder, and valves arranged to control said openings, substan-y tially as described.

6. In an apparatus of the character de- 

